Definition of Fuse

2.v. i. To be reduced from a solid to a fluid state by heat; to be melted; to melt.

3.n. A tube or casing filled with combustible matter, by means of which a charge of powder is ignited, as in blasting; -- called also fuzee. See Fuze.

4.n. A wire, bar, or strip of fusible metal inserted for safety in an electric circuit. When the current increases beyond a certain safe strength, the metal melts, interrupting the circuit and thereby preventing possibility of damage.